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| Title: | EXAFS studies of bimetallic Ag-Pt and Ag-Pd nanorods |
| Author (s): | Bertino, Massimo Blum, Frank D. Bunker, B.A. Chattopadhyay, Soma Doudna, C.M. Lahiri, Debdutta Tokuhiro, Akira Terry, J. |
| Department/Lab Affiliations: | Chemistry Materials Research Center Mining & Nuclear Engineering Physics |
| Keywords: | EXAFS Gamma rays bimetallic Ag-Pt and Ag-Pd nanorods optical absorption spectroscopy transmission electron microscopy (TEM) x-ray Absorption Fine Structure (XAFS) spectroscopy |
| Issue Date: | 2005 |
| Publisher: | Institute of Physics |
| Citation: | Bertino, Massimo., Blum, Frank D., Bunker, B.A., Chattopadhyay, Soma., Doudna, C.M., Lahiri, Debdutta., Tokuhiro, Akira., and Terry, J. "EXAFS Studies of Bimetallic Ag-Pt and Ag-Pd Nanorods." Physica Scripta, vol. T115, (2005). |
| Abstract: | Nanoparticles of Ag-Pt and Ag-Pd with high aspect ratios were synthesized using a radiolysis method. Gamma rays at dose rates below 0.5 kGy/h were used for irradiation. The nanoparticles were characterized by transmission electron microscopy (TEM), optical absorption spectroscopy and x-ray Absorption Fine Structure (XAFS) spectroscopy. Bright field micrographs show that Ag-Pt nanowires are composed of large particles with diameters ranging from 20–30 nm and joined by filaments of diameter between 2–5 nm. The Ag-Pd nanowires have diameters of 20–25 nm and lengths of 1.5 μm. For XAFS measurements, the Pt L3 edge (11.564 keV), Ag K-edge (25.514 keV) and Pd K-edge (24.350 keV) were excited to determine the local structure around the respective atoms in the cluster. The Ag-Pt particles were found to possess a distinct core-shell structure with Pt in the core surrounded by Ag shell, with no indication of alloy formation. However, nanorods of Ag-Pd have formed an alloy for all the alloy compositions. |
| Type: | Article - Journal text |
| In Title: | Physica Scripta |
| Copyright Notice: | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. FULL COPYRIGHT INFORMATION: |
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| title | EXAFS studies of bimetallic Ag-Pt and Ag-Pd nanorods |
| contributor.author | Bertino, Massimo |
| contributor.author | Blum, Frank D. |
| contributor.author | Bunker, B.A. |
| contributor.author | Chattopadhyay, Soma |
| contributor.author | Doudna, C.M. |
| contributor.author | Lahiri, Debdutta |
| contributor.author | Tokuhiro, Akira |
| contributor.author | Terry, J. |
| contributor.deptlab | Chemistry |
| contributor.deptlab | Materials Research Center |
| contributor.deptlab | Mining & Nuclear Engineering |
| contributor.deptlab | Physics |
| subject | EXAFS |
| subject | Gamma rays |
| subject | bimetallic Ag-Pt and Ag-Pd nanorods |
| subject | optical absorption spectroscopy |
| subject | transmission electron microscopy (TEM) |
| subject | x-ray Absorption Fine Structure (XAFS) spectroscopy |
| date.issued | 2005 |
| publisher | Institute of Physics |
| identifier.citation | Bertino, Massimo., Blum, Frank D., Bunker, B.A., Chattopadhyay, Soma., Doudna, C.M., Lahiri, Debdutta., Tokuhiro, Akira., and Terry, J. "EXAFS Studies of Bimetallic Ag-Pt and Ag-Pd Nanorods." Physica Scripta, vol. T115, (2005). |
| description.abstract | Nanoparticles of Ag-Pt and Ag-Pd with high aspect ratios were synthesized using a radiolysis method. Gamma rays at dose rates below 0.5 kGy/h were used for irradiation. The nanoparticles were characterized by transmission electron microscopy (TEM), optical absorption spectroscopy and x-ray Absorption Fine Structure (XAFS) spectroscopy. Bright field micrographs show that Ag-Pt nanowires are composed of large particles with diameters ranging from 20–30 nm and joined by filaments of diameter between 2–5 nm. The Ag-Pd nanowires have diameters of 20–25 nm and lengths of 1.5 μm. For XAFS measurements, the Pt L3 edge (11.564 keV), Ag K-edge (25.514 keV) and Pd K-edge (24.350 keV) were excited to determine the local structure around the respective atoms in the cluster. The Ag-Pt particles were found to possess a distinct core-shell structure with Pt in the core surrounded by Ag shell, with no indication of alloy formation. However, nanorods of Ag-Pd have formed an alloy for all the alloy compositions. |
| type | Article - Journal |
| type.DCMIType | text |
| type.status | Final version |
| rights | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. |
| rights.URI | |
| relation.isPartOf | Physica Scripta |
| date.accessioned | 2007-04-11T17:00:48Z |
| date.available | 2008-03-31T18:18:11Z |
| identifier.persist.URI |